radiations and their facts Flashcards
1
Q
Composition of alpha
A
He nucleus from the nucleus
2
Q
Composition of beta
A
High energy electrons from the nucleus
3
Q
Composition of gamma rays
A
Electromagnetic radiation from the nucleus
4
Q
Charge of alpha
A
+2
5
Q
Charge of beta
A
-1
6
Q
Charge of gamma
A
0
7
Q
Ionisation of alpha
A
strongly ionising
8
Q
Ionisation of beta
A
moderately ionising
9
Q
Ionisation of gamma
A
weakly ionising
10
Q
Range of alpha
A
few cm in air and stopped by thin sheet of paper
11
Q
Range of beta
A
30 cm in air and stopped by 5 mm of aluminium
12
Q
Range of gamma
A
Penetrates through several cm of lead and several cm of concrete
13
Q
alpha notes
A
- Emmited from nucleus of large atom
- large mass
- 10% speed of light
14
Q
beta notes
A
- Emmited from nucleus of atom
- Neutron in the atom is transformed into a proton and electron, which is ejected
- small mass compared to alpha particle
- 90% speed of light
15
Q
gamma notes
A
- Emmited from nucleus of atom
- no mass and no charge
- excited nucleus emits gamma rays
- speed of light
